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Comparison of an amorphous silicon/cesium iodide flat-panel digital chest radiography system with screen/film and computed radiography systems--a contrast-detail phantom study


, : Comparison of an amorphous silicon/cesium iodide flat-panel digital chest radiography system with screen/film and computed radiography systems--a contrast-detail phantom study. Medical Physics 28(11): 2328-2335

Flat-panel (FP) based digital radiography systems have recently been introduced as a new and improved digital radiography technology; it is important to evaluate and compare this new technology with currently widely used conventional screen/film (SF) and computed radiography (CR) techniques. In this study, the low-contrast performance of an amorphous silicon/cesium iodide (aSi/Csl)-based flat-panel digital chest radiography system is compared to those of a screen/film and a computed radiography system by measuring their contrast-detail curves. Also studied were the effects of image enhancement in printing the digital images and dependence on kVp and incident exposure. It was found that the FP system demonstrated significantly better low-contrast performance than the SF or CR systems. It was estimated that a dose savings of 70%-90% could be achieved to match the low-contrast performance of the FP images to that of the SF images. This dose saving was also found to increase with the object size. No significant difference was observed in low-contrast performances between the SF and CR systems. The use of clinical enhancement protocols for printing digital images was found to be essential and result in better low-contrast performance. No significant effects were observed for different kVps. From the results of this contrast-detail phantom study, the aSi/CsI-based flat-panel digital chest system should perform better under clinical situations for detection of low-contrast objects such as lung nodules. However, proper processing prior to printing would be essential to realizing this better performance.

US$19.90

PMID: 11764040

DOI: 10.1118/1.1408620


Other references

Aberorombie, M.; Johnson, M.L., 1942: The out-wandering of cella in wallerian degeneration. Journal of Experimental Biology London, 19: 266-283

Walsh, Oliver S., 1939: Problems of distribution and variation in the genus Zygadenus. Amer Jour Bot 26(8): 677

Kesselyak, A., 1936: Die Landassel-fauna von Komitat Bars. Allattani Kozlemenyek Budapest, 33: 142-148

Baldock S.A.; Harris P.J.; Munday K.A.; Noble A.R.; Winch M.A., 1974: Evidence for changes in the enzymic activity of renin following partial renal artery occlusion in the dog. INSERM (Institut National de la Sante et de la Recherche Medicale) Colloque 30: 141

Eitzen, Oliver, 1946: Carotoid-cavernous fistula. A case is presented in which the defect of the carotid artery was unusually large and there was marked distention of the cavernous sinus. No pulsating exophthalmos had been noted. No hemorrhage in the brain or subarachnoid space was found. Arteria...

Chaabouni H.; Douiri H.; Abdelkefi M.M.; Miladi M.; Slimane N.; Ferchiou A., 1986: Genetic study of eight cases of spondyloepiphyseal dysplasia tarda inherited as an autosomal recessive. Spondylo-epiphyseal dysplasia tarda is an hereditary disease of bone first described by Maroteaux in 1957. The disease affects only boys, then is transmitted on X-linked recessive pattern. The authors describe two Tunisian families with 8 patients...

Reiderman M.I., 1989: Current problems of pulmonary auscultation. Terapevticheskii Arkhiv 61(4): 113-116

Mal'kiavichius, S.K.; Ianushaĭtis, P.P., 1981: Comparison of the stroboscopic effect in humans and fish. Biofizika 26(1): 117-118

El-Bardicy, M.G.; Bebawy, L.I.; Amer, M.M., 1992: Stability-indicating method for the determination of clorazepate dipotassium-II. Via N-desmethyldiazepam and determination of its degradation products. A spectrophotometric method for the determination of the intact clorazepate dipotassium in the presence of its degradation products is developed. It depends upon preliminary hydrolysis of clorazepate dipotassium-thus liberating its equivalent of N...

Rachmilewitz E.A.; White J.M., 1973: Hemi chrome formation during the in vitro oxidation of hemo globin koeln. Nature New Biology 241(108): 115-117